what am i supposed to be doing?

Have you ever had the feeling of you know that you want to do something so bad but there is something else in the back of your mind that you think you might want to be doing? Well thats the situation im in right now. I want to be a nurse so bad, but you cant even be considered for the program if you havent passed all your prereqs. I havent passed A&P and i didnt ever get put into sociology and i need those two classes to be even considered for nursing. Another thing is that you have to pass all the classes with a "c" or above and there are no second chances so if you dont pass them you are out of the program.
The other thing that is in the back of my mind is elementary education. I dont know why this was placed upon my heart but it was and i cant help but wonder maybe this is what God actually wants me to be doing instead of nursing.
I dont know what im supposed to and do, i have prayed about it i still dont know what to do. =(